发明名称 |
Method and apparatus for testing a magnetic bubble memory |
摘要 |
Method and apparatus for testing a magnetic bubble memory are disclosed wherein a most severe magnetic bubble domain arrangement which fully causes the ununiformity of magnetic interaction between magnetic bubble domains is experimentally determined, and a basic pattern [P] and a test information pattern determining an arrangement of the basic patterns [P] and complementary patterns [P] thereof for realizing that magnetic bubble domain arrangement are stored in memory units, respectively, and the basic patterns [P] and the complementary patterns [P] are sequentially read out in accordance with the test information pattern to generate magnetic bubble domain trains in a storage area of the magnetic bubble memory. The magnetic bubble domain trains are then read out by a magnetic bubble detector and the read-out signals are converted to logical signals by a sense amplifier unit and the logical signals are synchronized with logical signals corresponding to the test information pattern and compared therewith to produce an identity or non-identity signal and thus the disclosed method and apparatus for testing the magnetic bubble memory can exactly evaluate a memory characteristic of the magnetic bubble memory.
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申请公布号 |
US4233668(A) |
申请公布日期 |
1980.11.11 |
申请号 |
US19780946864 |
申请日期 |
1978.09.29 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE PUBLIC CORPORATION |
发明人 |
YAMAGUCHI, NAKAHIKO;HIBI, SUSUMU;YOSHIZAWA, SHIGERU;YOSHIMOTO, SHOJI;KOBAYASHI, AKIRA |
分类号 |
G11C11/14;G11C19/08;G11C29/00;(IPC1-7):G11C19/08 |
主分类号 |
G11C11/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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